Underwear worn by bearer for farce (8)
I believe the answer is:
travesty
'farce' is the definition.
('travesty' can be a synonym of 'farce')
'underwear worn by bearer' is the wordplay.
'underwear' becomes 'vest'.
'worn by' means one lot of letters goes inside another (I've seen this in other clues).
'bearer' becomes 'tray' (I've seen this before).
'vest' placed within 'tray' is 'TRAVESTY'.
'for' acts as a link.
(Other definitions for travesty that I've seen before include "Take off" , "Absurd misrepresentation" , "Sham" , "Burlesque, mockery" , "Absurd representation" .)